Since a direct translation produces invalid html (although still working!), delving on tag semantics is a bit premature Talking about semantics, for Simutrans help texts the presentation is the semantic meaning.

Anyway, this tool helps a lot for translating and reviewing the help system as a whole, so it's a huge help even if not html 4.01 strict...

Unfortunately, japanse font weight is light, so white and red texts is not readable in simutrans help, even if it is semantics.Only the readable text with highlighted is italic which is highlighted by yellow.There is no alternative for us.